Stoichiometry: Baking Soda and Vinegar Reactions Student Version
|
|
- Aldous Wells
- 6 years ago
- Views:
Transcription
1 Stoichiometry: Baking Soda and Vinegar Reactions Student Version In this lab, students will examine the chemical reaction between baking soda and vinegar, and mix different amounts of these household chemicals to learn about the concept of stoichiometry. Key Concepts: Stoichiometry is the quantitative balancing of elements in chemical reactions. Conservation of mass requires that all atoms that enter a reaction as reactants must exit the reaction in the products. The Ideal Gas Law is used to model equilibrium conditions of most gases, relating the pressure, volume, temperature, and moles of gas. Introduction: This lab demonstrates the reactivity of two household cooking items, baking soda and vinegar. Baking soda is a powdered chemical compound called sodium bicarbonate, and vinegar includes acetic acid. These 2 components react in solution to form carbon dioxide, water, and sodium acetate as shown in the chemical reaction below: (baking soda) + (vinegar) à (carbon dioxide) + (water) + (sodium acetate) NaHCO 3 (aq) + CH 3 COOH (aq) à CO 2 (g) + H 2 O (l) + CH 3 COONa (aq) Looking closely at this equation, examine whether it is balanced or not. How many Hydrogen atoms are in the reactants? In the products? How many Oxygen atoms are in the reactants? In the products? How many Carbon atoms are in the reactants? In the products? How many Sodium atoms are in the reactants? In the products? Is this reaction in Equation 1 stoichiometrically balanced?
2 Part 1: 1. Fill the soda bottle with 1 cup of vinegar. 2. Cut a small corner from the clear bag and add ¼ tsp of baking soda into the bag fragment as shown below: 3. Carefully, drop the small bag into the soda bottle with the corner of the bag pointed downwards and quickly close the bottle. The goal is to twist the cap so it is airtight before the baking soda reacts comes into contact with the vinegar. 4. Shake the bottle gently until all the baking soda has reacted with the vinegar. Allow the solution to fizz up then slowly settle. Wait until the baking soda has dissolved completely into the vinegar, shown by no significant bubbling in the bottle. Keep the bottle sealed for Part 2. (Note: The bottle should be stiffening to a squeeze as the reaction continues.)
3 Part 2: 1. Submerge the closed jar in the water tub with the lid facing downward. 2. Remove the lid while keeping the jar below water. By keeping the opening of the jar under water at all times, all of the water will remain inside the jar 3. As your partner holds the jar, place the 20 oz. bottle from part 1 underwater and then slide the top of it inside the opening of the jar. Slowly unscrew the cap to release all of the carbon dioxide into the jar. Note: The water level inside the jar should be slowly decreasing as the gas inside the bottle is released. Be very careful to catch all the carbon dioxide in the jar. 4. Record the amount of trapped air inside the jar. Make sure the water inside and outside the bottle is at the same level before you record.
4 5. Establish a control by repeating the experiment, but omitting the addition of any baking soda. This will measure the amount of air already inside the bottle before any reaction has occurred. 6. Repeat the same experiment, but instead use ½ tsp of baking soda. Record your results in the table below: 7. Repeat the same experiment, but instead use ½ tsp of baking soda. Record your results in the table below: Amount/ tsp ¼ Total Volume/mL Volume CO 2 produced (V total - V control ) Control (0 tsp) ½
5 Concept Questions: Stoichiometry Determine whether the amount of reaction products you observed agrees with stoichiometric predictions. One underlying assumption is that the baking soda is the only limiting reactant. In other words, there is essentially an unlimited supply of acetic acid in the vinegar bottle, and the reaction output is only dictated by the amount of baking soda you add every mole added results in a mole of carbon dioxide produced. Use the following steps to calculate the number of moles of carbon dioxide produced: Q1. Determine the density of baking soda (NaHCO 3). a. Net weight of the baking soda container (labeled on box): g b. Volume in the container (from Nutrition Facts: serving size x number of servings): tsp c. Density = Net weight/volume = g/tsp Q2. Mass in ¼ tsp NaHCO 3 = g Q3. Molecular weight (the mass of one mole) of NaHCO 3 (get from periodic table): Na= H= C= O= ; NaHCO 3 = g/mol Q4. Moles in ¼ tsp baking soda: grams used of NaHCO 3 molecular weight of NaHCO 3 g = = moles g/mol Q5. How many moles of CO 2 do you expect from ¼ tsp NaHCO 3? moles CO 2 Q6. How many moles of CO 2 do you expect from ½ tsp NaHCO 3? moles CO 2
6 Gaseous Volume Prediction The Ideal Gas Law is an equation that roughly models equilibrium properties of most gases: (pressure) x (volume) = (moles) x (Ideal Gas Constant) x (temperature) or pv = nrt, where R, the Ideal Gas Constant, = L-atm/mol-K Essentially, this law states that increasing the amount of moles of gas in a system can increase the system s volume and pressure. Q7. Rearrange the ideal gas law to give an expression for the number of moles of a gas with known temperature, pressure and volume (solve for moles): Q8. The pressure of the gas when measuring its volume as described in the lab is approximately 1 atm, and the temperature is approximately 300 K. Using the volume of gas you measured in the lab, how many moles of CO 2 did you observe as reaction products: from ¼ tsp baking soda? from ½ tsp baking soda? Q9. Did your stoichiometric predictions agree with the experimental observations? Q10. Why was it necessary to add the baking soda to the vinegar inside a plastic pouch? Q11. Why is it important to have a tight seal of the cap on top of the bottle when mixing the two reaction components?
Stoichiometry: Baking Soda and Vinegar Reactions Student Advanced Version
Stoichiometry: Baking Soda and Vinegar Reactions Student Advanced Version In this lab, students will examine the chemical reaction between baking soda and vinegar, and mix different amounts of these household
More informationStoichiometry: Baking Soda and Vinegar Reactions Teacher Version
Stoichiometry: Baking Soda and Vinegar Reactions Teacher Version In this lab, students will examine the chemical reaction between baking soda and vinegar, and mix different amounts of these household chemicals
More informationAre Chemical Reactions Closed Systems?
Measuring a Chemical Reaction 1. Place about 100 ml of vinegar in a large plastic cup. Carefully weigh the cup AND the vinegar all together, and write down the total mass. (Don t worry about subtracting
More informationStoichiometry Decomposition of Baking Soda For our soul is humbled down to the dust. Psalms 43:25
Stoichiometry Decomposition of Baking Soda For our soul is humbled down to the dust. Psalms 43:25 Introduction A balanced chemical reaction shows products forming reactants such that the Law of Conservation
More informationGas Laws. by Dawn Richardson PhD, Collin College, Preston Ridge Campus; revised by Jim Sizemore PhD, Collin College, Central Park Campus
Gas Laws by Dawn Richardson PhD, Collin College, Preston Ridge Campus; revised by Jim Sizemore PhD, Collin College, Central Park Campus Introduction: A gas is a state of matter in which atoms or molecules
More informationPhysical or Chemical Change?
Chemical Formulas and Equations Physical or Chemical Change? Matter can change physically or chemically; a process that produces a chemical change is a chemical reaction. Chemical Formulas and Equations
More informationSafety: Safety goggles should be worn at all times. Students should hold the balloons on the test tubes tightly while the reaction takes place.
LIMITING REAGENT LAB: THE REACTION BETWEEN VINEGAR AND BAKING SODA Goal: During this lab students will gain a quantitative understanding of limiting reagents. Safety: Safety goggles should be worn at all
More informationCHEMICAL REACTION IN A BAGGY (MODIFIED FOR ADEED)
CHEMICAL REACTION IN A BAGGY (MODIFIED FOR ADEED) Overview: Students investigate chemical reactions using given substances. Students identify chemical reactions in their daily lives. Objectives: The student
More informationChemistry I Chapter 9 Stoichiometry Objective Sheet. Equation 1. Objectives: 1. Define stoichiometry
Chemistry I Chapter 9 Stoichiometry Objective Sheet Equation 1 2 C 2 H 2 (g) + 5 O 2 (g) 4 CO 2 (g) + 2 H 2 O (g), at STP C 2 H 2 (acetylene) 26 g/mol O 2 32 g/mol CO 2 44 g/mol H 2 O 18 g/mol Objectives:
More informationBy: Michael Wild, Matt Huber, Jasmine Gilbert and Dr. Faith Yarberry
Acid Chemistry By: Michael Wild, Matt Huber, Jasmine Gilbert and Dr. Faith Yarberry In this module the student will: Understand the concept of an Acid. Discover the differences between strong acids and
More informationMoles Lab Activity 1: PCU (Popcorn Counting Units)
Moles Lab Activity 1: PCU (Popcorn Counting Units) Materials: A container of each of the following: Popcorn kernels Another type of beans A large unopened bag of popcorn Kernels Balance Safety goggles
More informationKEEP THIS SECTION!!!!!!!!!
KEEP THIS SECTION!!!!!!!!! CHEMISTRY 0 Hour Exam I (Multiple Choice Section) September 7, 018 Dr. D. DeCoste Name Signature T.A. This exam contains 0 questions on 4 numbered pages. Check now to make sure
More informationBags of Reactions Chemistry I Acc
Introduction: Bags of Reactions Chemistry I Acc Plop, plop, fizz, fizz, oh, what a relief it is. claims the old TV ad for a popular antacid. Just what is in the tablet that is relieving the upset stomach?
More informationName Period Date. Lab 1: Mass of Ice Materials: beaker, ice and balance.
Name Period Date Testing the Law of Conservation of MASS! Introduction: Does mass change in a chemical or physical reaction? In this series of experiments you will find the answer to this question. Lab
More informationBellevue College CHEM& 121 Experiment: Stoichiometric Analysis of an Antacid 1
Experiment: Stoichiometric Analysis of an Antacid 1 Introduction In this lab, you will use the concept of stoichiometry to solve two sequential problems. First, you will try to determine the products of
More informationThe Chemistry Summary Sheet Chemistry is the scientific study of matter.
The Chemistry Summary Sheet Chemistry is the scientific study of matter. ATOMIC STRUCTURE: -an atom is composed of three fundamental particles: proton, electron, neutron. -atom size mostly consists of
More informationThe masses of reactants and products are equal.
Page 1 of 7 KEY CNCEPT The masses of reactants and products are equal. BEFRE, you learned Chemical reactions turn reactants into products by rearranging atoms Chemical reactions can be observed and identified
More informationLab 2-Investigating the Law of Conservation of Mass
Name: Period: Lab 2-Investigating the Law of Conservation of Mass Objective: To corroborate the law of conservation of mass through laboratory experimentation. Background: When wood burns or water evaporates,
More informationStoichiometry Ch. 11. I. Stoichiometric Calculations
Stoichiometry Ch. 11 I. Stoichiometric Calculations Background on things you NEED to know how to do: 1. Name/write correct chemical formula 2. Write chemical equations 3. Balance chemical equations 4.
More informationGoal: During this lab students will gain a quantitative understanding of limiting reagents.
LIMITING REAGENT LAB: THE REACTION BETWEEN VINEGAR AND BAKING SODA Goal: During this lab students will gain a quantitative understanding of limiting reagents. Safety: Safety goggles should be worn at all
More informationc. K 2 CO 3 d. (NH 4 ) 2 SO 4 Answer c
Chem 130 Name Exam 2, Ch 4-6 July 7, 2016 100 Points Please follow the instructions for each section of the exam. Show your work on all mathematical problems. Provide answers with the correct units and
More informationLab Activity 3: Gravimetric Stoichiometry 2
Chemistry 2202 Gravimetric Stoichiometry Lab 2 1 Lab Activity 3: Gravimetric Stoichiometry 2 Introduction: Stoichiometry involves making predictions about how much of one substance should react or be produced
More informationVANDERBILT STUDENT VOLUNTEERS FOR SCIENCE
VANDERBILT STUDENT VOLUNTEERS FOR SCIENCE http://studentorgs.vanderbilt.edu/vsvs Evidence of a Chemical Reaction Fall 2018 Goal: To show students evidence of a chemical change. Fits TN standards:7ps1.2,
More informationWhat Do You Think? Investigate GOALS
Activity 2 More Chemical Changes GOALS In this activity you will: Observe several typical examples of evidence that a chemical change is occurring. Make generalizations about the combinations of materials
More informationCharacteristics of Chemical Change
Section 2 Characteristics of Chemical Change What Do You See? Learning Outcomes In this section you will Observe several typical examples of evidence that a chemical change is occurring. Make generalizations
More informationExploring Acids & Bases
Food Explorations Lab: Exploring Acids & Bases STUDENT LAB INVESTIGATIONS Name: Lab Overview In this investigation, you will use cabbage juice indicator to determine if two unknown samples are acids or
More informationCHM111 Lab Titration of Vinegar Grading Rubric
Name Team Name CHM111 Lab Titration of Vinegar Grading Rubric Criteria Points possible Points earned Lab Performance Printed lab handout and rubric was brought to lab 3 Safety and proper waste disposal
More informationCO 2. Lesson 1. Production of a gas
Lesson 1 Production of a gas T E A C H E R G U I D E CO 2 Lesson summary Students meet volcanologist Victor Helguson, who is studying the gases released by volcanoes in Iceland. Students conduct a chemical
More informationChemical Reaction Lab Bagged Chemical Reactions
Learning Target: The student experiments and determines that the rates of reaction among atoms and molecules depend on the concentration, pressure, and temperature of the reactants and the presence or
More informationGas Volumes and the Ideal Gas Law
Section 3, 9B s Gases react in whole-number ratios. Equal volumes of gases under the same conditions contain equal numbers of molecules. All gases have a volume of 22.4 L under standard conditions. In
More informationModeling Conservation of Matter
Modeling Conservation of Matter Imagine that you and two of your classmates want to make a strawberry banana smoothie. You lay out the ingredients: one banana, five strawberries and two scoops of ice cream.
More informationChemical Reactions Lab PSI Chemistry
Chemical Reactions Lab PSI Chemistry Name Purpose: Observe the different types of chemical reactions. Materials: - 6 test tubes - test tube rack - 0.3 M copper(ii)sulfate solution - 0.3 M sodium hydroxide
More informationThe Great Gas Plot. Using Balloons and Graphs to Analyze Relationships
Chemistry The Great Gas Plot Using Balloons and Graphs to Analyze Relationships MATERIALS AND RESOURCES EACH GROUP baking soda balance 8 balloons 8 clamps, balloon funnel, powder graduated cylinder, 1000
More informationMONDAY (12/12) TUESDAY (12/13) WEDNESDAY (12/14) THURSDAY (12/15) FRIDAY (12/16) Making Acid Rain (a lab) Quiz
Homework Activities Name: Date: Period: This week, we will be using our knowledge of acids and bases and studying how acids, specifically acid rain, affect our lives and our environment. We will also end
More informationVOCABULARY Define. 1. stoichiometry. 2. composition stoichiometry. 3. reaction stoichiometry. 4. unknown. 5. mole ratio
CHAPTER 9 HOMEWORK 9-1 (pp. 275 279) Define. 1. stoichiometry 2. composition stoichiometry 3. reaction stoichiometry 4. unknown 5. mole ratio SKILL BUILDER On a separate sheet of paper, write five possible
More informationChemistry 1A, Fall 2010 Midterm Exam #1 September 15, 2010 (90 min, closed book)
Chemistry 1A, Fall 010 Midterm Exam #1 September 15, 010 (90 min, closed book) Name: KEY SID: GSI Name: The test consists of 5 short answer questions and 18 multiple choice questions. Put your written
More informationLab #9- Calorimetry/Thermochemistry to the Rescue
Chesapeake Campus Chemistry 111 Laboratory Lab #9- Calorimetry/Thermochemistry to the Rescue Objectives Determine whether a reaction is endothermic or exothermic. Determine the best ionic compound of to
More informationLAB 8: DETERMINATION OF ACETIC ACID CONTENT IN VINEGAR
LAB 8: DETERMINATIN F AETI AID NTENT IN VINEGAR Lab format: This lab is designed for delivery using the Remote Web-based Science Laboratory (RWSL) or a lab kit. INTRDUTIN In an acid-base titration, the
More informationApply the ideal gas law (PV = nrt) to experimentally determine the number of moles of carbon dioxide gas generated
Teacher Information Ideal Gas Law Objectives Determine the number of moles of carbon dioxide gas generated during a reaction between hydrochloric acid and sodium bicarbonate. Through this investigation,
More informationCHEMISTRY 202 Practice Hour Exam I. Dr. D. DeCoste T.A.
CHEMISTRY 202 Practice Hour Exam I Fall 2016 Dr. D. DeCoste Name Signature T.A. This exam contains 23 questions on 9 numbered pages. Check now to make sure you have a complete exam. You have two hours
More informationExperiment #7. Titration of Vinegar
Experiment #7. Titration of Vinegar Goals 1. To determine the mass percent of acetic acid in a solution via titration. 2. To master the technique of titration. Introduction Vinegar is a common household
More informationResearch tells us fourteen out of any ten individuals like chocolate. Happy Halloween!
CHEMISTRY 101 Hour Exam II October 31, 2006 Adams/Le Name KEY Signature T.A./Section Research tells us fourteen out of any ten individuals like chocolate. Happy Halloween! This exam contains 17 questions
More informationMore Chemical Changes
Activity 2 More Chemical Changes Activity 2 More Chemical Changes GOALS In this activity you will: Observe several typical examples of evidence that a chemical change is occurring. Make generalizations
More informationAcid-Base Titration Acetic Acid Content of Vinegar
Acid-Base Titration Acetic Acid Content of Vinegar Prelab Assignment Read the entire lab. Write an objective and any hazards associated with this lab in your laboratory notebook. On a separate sheet of
More informationIdeal Gas & Gas Stoichiometry
Ideal Gas & Gas Stoichiometry Avogadro s Law V a number of moles (n) V = constant x n Constant temperature Constant pressure V 1 /n 1 = V 2 /n 2 Ammonia burns in oxygen to form nitric oxide (NO) and water
More information8.5E: Chemical Reactions
Reflect Have you ever seen fireworks explode in the sky? If so, you may have observed a variety of different colors and shapes in the sky and watched with amazement as the colors changed overhead. These
More informationKEY Chem 1A First Midterm Examination February 7, 2005 Professor David Chandler
KEY Chem 1A First Midterm Examination February 7, 2005 Professor David Chandler 1 2 3 4 5 6 7 8 9 10 Extra Name: Signature: Section: GSI: Instructions As indicated, either fill in blank space with appropriate
More informationMiSP CHEMICAL REACTIONS, L3 Teacher Guide. Introduction
MiSP CHEMICAL REACTIONS, L3 Teacher Guide Introduction This weeklong unit should be included with other chemistry content teaching and learning. It is designed to follow Intermediate Level Science Core
More informationMatter. Anything that has mass and takes up space. Solids Liquids Gases
Introduction to Matter Matter Anything that has mass and takes up space Solids Liquids Gases Weight A measure of the gravitational force exerted on an object What is the difference between weight and mass?
More informationCulinary Chemistry: Stoichiometry Made Simple
Culinary Chemistry: Stoichiometry Made Simple Background Stoichiometry is based on the law of conservation of mass which states that the mass of the reactants in a chemical reaction equals the mass of
More informationIn this laboratory exercise we will determine the percentage Acetic Acid (CH 3 CO 2 H) in Vinegar.
The titration of Acetic Acid in Vinegar In this laboratory exercise we will determine the percentage Acetic Acid (CH CO H) in Vinegar. We will do this by Titrating the Acetic Acid present with a Strong
More informationChapter 3 Stoichiometry: Calculations with Chemical Formulas and Equations. Stoichiometry
Chapter 3 : Calculations with Chemical Formulas and Equations Anatomy of a Chemical Equation CH 4 (g) + 2 O 2 (g) CO 2 (g) + 2 H 2 O (g) Anatomy of a Chemical Equation CH 4 (g) + 2 O 2 (g) CO 2 (g) + 2
More informationCopyright 2016 Edmentum - All rights reserved.
Copyright 2016 Edmentum - All rights reserved. SI: Quiz 5 Question #1 Which of the following is true about the mass of the reactants in a chemical reaction? The total mass of the reactants in a chemical
More informationGas Volumes and the Ideal Gas Law
SECTION 11.3 Gas Volumes and the Ideal Gas Law Section 2 presented laws that describe the relationship between the pressure, temperature, and volume of a gas. The volume of a gas is also related to the
More informationLimiting Reactants Lab
Name: Teacher s Name: Class: Block: Date: Partners: Limiting Reactants Lab Purpose: Through experimentation, determine the limiting reactant and the percent yield in a chemical reaction that generates
More informationChem 2115 Experiment #7. Volumetric Analysis & Consumer Chemistry Standardization of an unknown solution, analysis of vinegar & antacid tablets
Chem 2115 Experiment #7 Volumetric Analysis & Consumer Chemistry Standardization of an unknown solution, analysis of vinegar & antacid tablets OBJECTIVE: The goals of this experiment are to learn titration
More informationName: Period: Date: Unit 7: Chemical Reactions Lesson 6: Mole Ratios
Name: Period: Date: Unit 7: Chemical Reactions Lesson 6: Mole Ratios By the end of today, you will have an answer to: How do you determine how much of a substance you will produce in a reaction? DO NOW:
More informationHow Much Gas is Produced?
Chemical Dominoes Activity 3 How Much Gas is Produced? CHEM POETRY At the end of the elements trendiest street Was a beaker where just getting in was a feat; One day ol Tony, an atom of tin, Went to Club
More informationChemistry 1A, Fall 2010 Midterm Exam #1 September 15, 2010 (90 min, closed book)
Chemistry 1A, Fall 010 Midterm Exam #1 September 15, 010 (90 min, closed book) Name: SID: GSI Name: The test consists of 5 short answer questions and 0 multiple choice questions. Put your written answers
More informationStandards 8.5.c. I know chemical reactions usually liberate or absorbs heat.
6 March 2013 Give an example of a physical change and a chemical change, and then describe how they are different from the other. Explain your answer in 2-3 sentences. Standards 8.5.c. I know chemical
More informationA Gas Uniformly fills any container. Easily compressed. Mixes completely with any other gas. Exerts pressure on its surroundings.
Chapter 5 Gases Chapter 5 A Gas Uniformly fills any container. Easily compressed. Mixes completely with any other gas. Exerts pressure on its surroundings. Copyright Cengage Learning. All rights reserved
More informationUNIT 6338: SAMPLE ACTIVITY 28 SAMPLE ASSESSMENT ACTIVITIES AND SCHEDULES PROTON TRANSFERS
UNIT 6338: SAMPLE ACTIVITY 28 SAMPLE ASSESSMENT ACTIVITIES AND SCHEDULES 6.129 6338 CHEMISTRY LEVEL 2 PROTON TRANSFERS This activity assesses: Unit: 6338 Characterise the behaviour of weak and strong acids
More informationChem 130 Name Exam 2 October 11, Points Part I: Complete all of problems 1-9
Chem 130 Name Exam October 11, 017 100 Points Please follow the instructions for each section of the exam. Show your work on all mathematical problems. Provide answers with the correct units and significant
More informationFun with Stoichiometry: Humpty Dumpty Meets the Air Bag!
Fun with Stoichiometry: Humpty Dumpty Meets the Air Bag! Step 1: Humpty Dumpty sat on a wall, Humpty Dumpty had a great fall; All the King's horses, and all the King's men Could not put Humpty Dumpty together
More informationReactions and Stoichiometry.
Problem Set Reactions and Stoichiometry. Clearly write answers on separate sheets. Show all work and units. 1. Classify the following chemical reactions according to the categories discussed in class.
More informationSupernatant: The liquid layer lying above the solid layer after a precipitation reaction occurs.
Limiting Reagent Introduction The quantities of substances involved in a chemical reaction represented by a balanced equation are often referred to as stoichiometric amounts. Solution stoichiometry is
More informationLEVEL ZERO VOICE CATALYST (10 minutes, individual work): 1. Counting atoms
Assignment 4 Chemical Detectives at the Molecular Level LO: To explain the differences between chemical and physical changes through observable evidence. EQ: What evidence can be used to tell the difference
More informationCHEM 101A EXAM 1 SOLUTIONS TO VERSION 1
CHEM 101A EXAM 1 SOLUTIONS TO VERSION 1 Multiple-choice questions (3 points each): Write the letter of the best answer on the line beside the question. Give only one answer for each question. B 1) If 0.1
More informationThe reactions we have dealt with so far in chemistry are considered irreversible.
1. Equilibrium Students: model static and dynamic equilibrium and analyse the differences between open and closed systems investigate the relationship between collision theory and reaction rate in order
More informationSulfuric acid is hazardous: Safety glasses are REQUIRED during this experiment.
CHEMICAL COMPOSITION Life exists on Earth because of the abundant presence of liquid water. While other planets have water, it may be primarily found as either a gas, as on Venus, or as a solid, such as
More information8.1 Chemical Properties and Changes. chemical property chemical change dissolving
8.1 Chemical Properties and Changes chemical property chemical change dissolving Ability to Change 8.1 Chemical Properties and Changes In a chemical change, the properties that give a substance its identity
More informationAPS Science Curriculum Unit Planner
APS Science Curriculum Unit Planner Grade Level/Subject Chemistry Stage 1: Desired Results Enduring Understanding Topic 4: The Mole and Stoichiometry: Atoms and moles are too small to count by usual means.
More informationChapter 6, Lesson 7: Energy Changes in Chemical Reactions
Chapter 6, Lesson 7: Energy Changes in Chemical Reactions Key Concepts If two substances react and the temperature of the mixture decreases, the reaction is endothermic. If two substances react and the
More informationChemical Reactions. Teachers Guide.
Chemical Reactions. Teachers Guide. Introduction: Almost everything you will ever see in this universe is made of atoms. Each different type of atom is known as a chemical element there are currently 118
More informationStudent Exploration: Chemical Changes
Name: Date: Student Exploration: Chemical Changes Vocabulary: acid, base, catalyst, chemical change, coefficient, conservation of matter, decomposition, dissolve, double replacement, endothermic, exothermic,
More informationStudent Notes. Chemical Reactions LINK
LCPS Core Experience Chemical Reactions Student Notes OBJECTIVES Students will: investigate the relationship between reactants and products. investigate an exothermic reaction. investigate an endothermic
More informationName Period Date. Lab: Introduction to Stoichiometry
Name Period Date Lab: Introduction to Stoichiometry Introduction: Reactants are not always present in the exact ratio required by a balanced chemical equation. In planning any cost-effective production
More informationStoichiometry. Please take out your notebooks
Stoichiometry Please take out your notebooks Stoichiometry stochio = Greek for element metry = measurement Stoichiometry is about measuring the amounts of elements and compounds involved in a reaction.
More informationMolar Mass to Moles Conversion. A mole is an amount of substance. The term can be used for any substance and 23
Molar Mass to Moles Conversion A mole is an amount of substance. The term can be used for any substance and 23 indicates the presence of 6.02 x 10 particles. (this is known as Avogadro s Number) Particles
More informationApply the concept of percent yield to stoichiometric problems. Methanol can be produced through the reaction of CO and H 2 in the presence of a
Apply the concept of percent yield to stoichiometric problems. Methanol can be produced through the reaction of CO and H 2 in the presence of a catalyst. CO (g) + H 2 (g) CH 3 OH (l) If 75.0 g of CO reacts
More information2012 AP CHEMISTRY FREE-RESPONSE QUESTIONS
01 AP CHEMISTRY FREE-RESPONSE QUESTIONS. A sample of a pure, gaseous hydrocarbon is introduced into a previously evacuated rigid 1.00 L vessel. The pressure of the gas is 0.00 atm at a temperature of 17C.
More informationSolution Chemistry: Making Solutions, Reactions, and Solubility
1 Solution Chemistry: Making Solutions, Reactions, and Solubility ORGANIZATION Mode: laboratory, groups of 4 Grading: goggles, closed-toe shoes, appropriate attire Safety: lab report, individual, due at
More informationExperiment #13. Enthalpy of Hydration of Sodium Acetate.
Experiment #13 Enthalpy of Hydration of Sodium Acetate Goal To determine the enthalpy (ΔH) for the following process: NaC 2 H 3 O 2 (s) + 3 H 2 O(l) à NaC 2 H 3 O 2 3H 2 O(s) Introduction Most chemical
More informationChem Lab Pretest ( a combo of last year s exam, Vanier s lab manual and a few new questions.)
Chem Lab Pretest ( a combo of last year s exam, Vanier s lab manual and a few new questions.) Graduated beakers are used to measure volumes roughly; they are containers with a precision of ±5%. Graduated
More informationChapter 9 STOICHIOMETRY
Chapter 9 STOICHIOMETRY Section 9.1: Introduction to Stoichiometry Stoichiometry: the calculation of quantities in chemical equations From Greek: Stoikheion = element Metron = to measure It s the bookkeeping
More informationLesson 2. Color change
Lesson 2 Color change T E A C H E R G U I D E Lesson summary Students meet marine chemist Sera Tuikabe, who is studying ocean acidification in the water surrounding the Republic of the Fiji Islands. Students
More informationEXPERIMENT. Titration for Acetic Acid in Vinegar
EXPERIMENT Titration for Acetic Acid in Vinegar Hands-On Labs, Inc. Version 42-0208-00-02 Review the safety materials and wear goggles when working with chemicals. Read the entire exercise before you begin.
More informationIntroduction to Stoichiometry
Introduction to Stoichiometry Objectives: Introduction to concepts of stoichiometry. How we use the coefficients How to determine the limiting reactant How mass figures into stoichiometry How to determine
More informationKITCHEN CHEMISTRY Identifying acids and bases with red cabbage indicator
KITCHEN CHEMISTRY Identifying acids and bases with red cabbage indicator By Darby Sloss and Marianne Smith Edited by Anne Starace Abstract Chemistry is an important part of our lives. Kitchen Chemistry
More informationAcid-Base Titrations
Chem 1252, General Chemistry I Lab Johnson Acid-Base Titrations Introduction Titration is a convenient quantitative method for accurately determining unknown concentrations of solutions. A necessary requirement
More informationFORM A. Answer d. b. ideal gas versus non-ideal (or real) gas: (5)
Chem 130 Name Exam 1, Ch 5-6 October 1, 011 100 Points Please follow the instructions for each section of the exam. Show your work on all mathematical problems. Provide answers with the correct units and
More informationExperiment 32C APPLICATIONS OF ACID-BASE EQUILIBRIA
Experiment 32C APPLICATIONS OF ACID-BASE EQUILIBRIA FV 23Feb18 MATERIALS: 50 ml buret (2), 25 ml graduated cylinder (2), 50 ml beaker (2), 150 ml beaker (2), small plastic vials (6), stirring rods (2),
More informationDetermination of the Identity of an Unknown Weak Acid
Determination of the Identity of an Unknown Weak Acid Adapted from R. C. Kerber et. al http://www.sinc.sunysb.edu/class/orgolab/che199_susb014.pdf; W.F. Kinard et.al http://www.cofc.edu/~kinard/221lchem/2002chem221labschedule.htm;
More informationChapter 3 C 2 H 4 O2. Mass Relationships, Stoichiometry and Chemical Formulas. Announcements. Learning Objectives. C x H y Oz
Announcements HOUR EXAM 1 --Want me to do recitation again? July 18 6-7:30PM --Skip Combustion Analysis & Isomers (p.82-83 in Principles of Chemistry Text) See me if you donʼt understand! Chapter 3 Relationships,
More informationCHAPTER 14: The Behavior of Gases
Name: CHAPTER 14: The Behavior of Gases Period: RELATIONSHIPS BETWEEN PRESSURE, VOLUME & TEMPERATURE OF A GAS Boyle s Law-Pressure and Volume Volume (ml) Pressure ( ) 60 50 40 30 20 10 Practice problem:
More informationSafety and Types of Fires
Cookin' Chem Activity 2 Safety and Types of Fires CHEM POETRY Oliver learned all those Don t s and Do s, The ones that get passed down through moles of O 2 s; Each new generation did soon learn to trust
More informationSupernatant: The liquid layer lying above the solid layer after a precipitation reaction occurs.
Limiting Reagent Introduction The quantities of substances involved in a chemical reaction represented by a balanced equation are often referred to as stoichiometric amounts. Solution stoichiometry is
More informationChemistry. End of Year Cornerstone Assessment
Chemistry End of Year Cornerstone Assessment The Cornerstone Assessments were developed with support through the VDOE Mathematics and Science Partnership Grant Program NCLB Title II, Part B program by
More information1. Determine the mass of water that can be produced when 10.0g of hydrogen is combined with excess oxygen. 2 H 2 + O 2 2 H 2 O
Pre-AP Chemistry Spring 2016 Final Review Objective 6.1: Students will recognize indicators of chemical change write balanced chemical equations to describe them based on common reactivity patterns. [S.12.C.1,
More informationChemistry 141 Samuel A. Abrash Chemical Reactions Lab Lecture 9/5/2011
Chemistry 141 Samuel A. Abrash Chemical Reactions Lab Lecture 9/5/2011 Q: Before we start discussing this week s lab, can we talk about our lab notebooks? Sure. Q: What makes a lab notebook a good notebook?
More information